TD5 Dual Mass flywheel problems
Andrew Mawson
dual mass flywheel for a standard one (Britpart conversion kit)
complete with new clutch pressure unit and friction plate. Clutch now
ok, however when idling in neutral there is a horrid rattling noise,
sounds like cogs are about to fly out of the gearbox! If transfer box
put in neutral sound is there in all gears in main box. Chap removes
the box, all looks well in the bell housing, no signs of distress. At
my suggestion spins up gear box on bench - no nasty noises. Puts it
all back together - horrid noise still present. He rings Britpart
technical support - 'oh yes they do that' !!!!!!!!!!!
Surely this cannot be right? He is now proposing to get another dual
mass flywheel and put that in to get us back to square one.
Anyone else had problems with the Britpart TD5 dual mass to standard
clutch conversion kit? I can't believe Britpart can just accept that
their product rattles like a bag of nails.
AWEM
hugh
<andrew@no_spam_please_mawson.org.uk> writes
indeed capable of such.
Following problems with a trailer loom (fog lamp bit) I have expressly
forbidden by local independent ever to put anything from Britpart on my
Defender ever again.
I don't think I can help with your rattles - clutch fork or thrust
bearing maybe.
Wrt to dual mass flywheel AIUI the purpose of this device is to reduce
the stress on the gearbox/transmission when the clutch is released with
modern high torque diesels.
Failure is often attributed to a heavy left foot.
If so replacing with a standard flywheel may not be such a good idea.
BIMBW
--
hugh
"Believe nothing. No matter where you read it, Or who said it, Even if
I have said it, Unless it agrees with your own reason And your own
common sense." Buddha
EMB
The whole point of a dual mass flywheel is to reduce gearbox chatter in
neutral. What you're hearing is precisely what I would expect. Better
gearbox oil will probably help matters, but otherwise you'll just have
to live with it.
Austin Shackles
enlightened us thusly:
And here was me thinking it was to add cost and complexity and something
else to go wrong to the vehicle....
handy knowledge though, I guess I won't bother with that kit for mine.
hugh
<austinDITCHTHIS...@ddol-las.net> writes
in idle - something I have never experienced regardless of flywheel
type. Bear in mind also that these things have now been introduced on
many (if not all) modern diesels. They are equally cursed from time to
time in uk.rec.caravanning.
Andrew Mawson
"hugh" <hugh@[127.0.0.1]> wrote in message
news:Jo6+GYL7...@raefell.demon.co.uk...
Yes that puzzled me too. Anyway chappie has now put in an original
dual mass flywheel and all is back to normal with no rattling. I can't
be certain that the chatter was the gearbox, infact I suspect it
wasn't. The Britpart kit apparently has an aluminium retainer for the
release bearing whereas I understand that the original is a plastic
one - just maybe it was that.
AWEM
hugh
<andrew@no_spam_please_mawson.org.uk> writes
>
DaveB
Well, sort of, they can help that, but....
Modern high torque engines (not just diesels) can produce significant
torque at low revs, just as everyone wants. But, the resulting torque
fluctuations (pulses) at low revs stresses just about everything in the
drive line, crankshaft onwards.
The Dual Mass Flywheel (DMF) is designed to smooth out such fluctuations
under load, drasticaly reducing the stress on the driveline, and engine,
also making the whole care much smoother to drive, as well as helping
silence neutral chatter at idle.
There is a supurb article in a recent AutoInform magazine (online
digital mag, Google for it, but you'll need to subscribe for free to get
it) describing these things, and what can fail if they are replaced by a
single mass flywheel.
They can (unlike the similar system fitted to most clutch friction
plates for many decades now) have over 100' of movement between the two
parts, they also have a "special" grease (whatever that is) between them
as a damping system.
Despite all the bad press about them, most modern vehicles with manual
'box's, from cars to trucks now have them fitted as standard, with only
a "relatively" low failure rate.
Of the ones I know that have failed, in each case the regular driver was
shall we say, "more enthusiastic than most" with the right foot.
I've also I found out recently, been driving cars (VW Passat, Honda
Accord, and now Mazda 6, and dozens of hired Transits etc) for the last
8 years, All fitted with DMF's.
As for $hitpart, like others, I wont have any of it any more, after
several recent experiences of parts that just don't fit. The last was a
Salisbury Axle Stub, some 2 thou' oversize, so bearings wont fit on it.
But it's cheap people cry. Well, £40 instead of over £75 for the
correct part.
You pay your money, and .........
Cheers.
DaveB
Andrew Mawson
"DaveB" <g8...@uko2.co.uk> wrote in message
news:MPG.27e4315a9...@aioe.org...
> correct part.
>
> You pay your money, and .........
>
> Cheers.
>
> DaveB
BLIMEY ! " .... 100 foot of movement between the two parts ...."
!!!!! That must make double de-clutching a tad difficult <G>
AWEM
kbv
andrew@no_spam_please_mawson.org.uk says...
hundred degrees! Yes ' is for feet in linear measurement, but you try
finding a degree symbol that'll get through the NG mail machinery when
you're stuck with a laptop keyboard.
DaveB.
EMB
http://www.cdxetextbook.com/trans/clutchMan/clutches/dualmassflywheels.html
gives a passable summary.
Duracell Bunny
alt-248 does it for me °
If you can't be a good example, then you'll just have to be a horrible warning.' Catherine Aird
DaveB
xner...@ubgznvy.pbz says...
>
> >> >
> alt-248 does it for me °
Indeed, I know that trick, but it's somewhst dificult on a laptop
keyboard with no numlock key!
DaveB
Austin Shackles
enlightened us thusly:
>But it's cheap people cry. Well, �40 instead of over �75 for the
>correct part.
>
>You pay your money, and .........
it rather depends on the part in question. in some cases, the saving is
much more than that, where the OEM part is more overpriced.
I've had a lot of Britprat stuff over the years and for the most part it's
been OK. I'd tend not to fit it for something as difficult to get at as the
flywheel though...
DaveB
austinDITCHTHIS...@ddol-las.net says...
Cheap or expensive, if it doesnt fit, it's naff.
But yes, if it's dificult to get to, best fit the right parts, to reduce
the need to do it all again too soon.
DaveB.